This article discusses the use of seawater evaporators at the Morro Bay, California, plant, which proved to be the least costly method of producing a freshwater supply for the plant. This demonstrates that it is possible to locate a plant on the seashore if the site is desirable but does not have freshwater. The submerged‐tube evaporator sets for Units 1 and 2 were effective for producing freshwater from seawater. The use of copper‐bearing, carbon‐steel‐welded shells for the evaporator shells was satisfactory, although some corrosion did occur. Scale control was maintained at a small cost of 2.5 cents per 1,000 gal of freshwater. The total cost of freshwater at full capacity was estimated to be $2.50 per 1,000 gal, with fuel costing 35 cents per 1,000,000 Btu. This cost can be reduced with newer types of seawater evaporators.